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Engine Displacement Formula:
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Engine displacement is the total volume of all the cylinders in an internal combustion engine. It's a key specification that indicates the engine's size and power potential, typically measured in cubic centimeters (cc) for motorcycles.
The calculator uses the displacement formula:
Where:
Explanation: The formula calculates the volume of a single cylinder (πr² × stroke) and multiplies by the number of cylinders, then converts from cubic millimeters to cubic centimeters.
Details: Engine displacement is a primary factor in determining engine power, torque characteristics, fuel consumption, and vehicle classification for licensing and racing categories.
Tips: Enter bore and stroke measurements in millimeters, and the number of cylinders. All values must be positive numbers for accurate calculation.
Q1: Why is displacement measured in cc?
A: Cubic centimeters (cc) provide a convenient unit for motorcycle engines, where 1000 cc equals 1 liter of displacement.
Q2: How does bore/stroke ratio affect engine performance?
A: Higher bore/stroke ratios typically favor higher RPM power (oversquare engines), while lower ratios favor torque at lower RPMs (undersquare engines).
Q3: What's the difference between actual and calculated displacement?
A: Calculated displacement is theoretical. Actual displacement may vary slightly due to manufacturing tolerances, combustion chamber design, and other factors.
Q4: Can this calculator be used for car engines?
A: Yes, the same formula applies to any piston engine, though car engines are typically measured in liters rather than cc.
Q5: How accurate is this calculation?
A: The calculation provides theoretical displacement. For precise measurements, actual engine blueprinting and measurement are required.